These show up as looking like single pixel white or, perhaps, light blue
dots in places where there shouldn't be light colored dots. I see about
7 of them on the wood or below it in the water and another 2 in the
water close to the sky about 1/4 of the distance in from the left side.
There is also a red dot at the extreme left edge about 15% of the
distance from bottom edge to top. They can be noise or "stuck pixels"
which means they're always on regardless of light level. The camera's
firmware should have a means of dealing with them. I'm not 100% sure
how it works but I think it merely notes what pixels are on in a totally
dark exposure (lens cap on) and then fills them in with appropriate
surrounding pixel colors in follow-on exposures.
Chuck Norcutt
On 10/28/2013 10:58 AM, Brian Swale wrote:
> Paul wrote;
>> On 10/27/13 09:21 : , Chuck Norcutt wrote:
>> Good luck. I see you have your competition cut out for you. I liked all
>> of Hooker's shots. The snakes were a bit of a surprise. I think they're
>> likely yellow rat snakes but I can't tell for sure.
>>
>> Chuck Norcutt
>>
>> I agree. His work is very nice. Except.. did anyone else notice the
>> "hot" pixels in this shot?
>>
>> http://chuck-hooker.squarespace.com/6rpi62suoynqgjb5m7o8f3gf11x1ug
>>
>> That the same thing my E-1 started to do, until someone finally told me to
>> run the pixel-mapping utility and they all went away. I only had three or
>> four - they're all over this image.
>
> No, I didn't, and still cannot. Must be something to do with screen size of
> image on my
> set-up..
>
> I wouldn't recognise a hot pixel even if it hit me in the face (g)
>
> Brian Swale
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|